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    <div class="post-body" itemprop="articleBody"><p>本文主要是任务之间的通信——互斥锁的使用实例的相关笔记，若笔记中有错误或者不合适的地方，欢迎批评指正😃。</p>
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<details class="folding-tag" blue><summary> 点击查看使用工具及版本 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center" width=150px>Windows版本</td>        <td align="left">windows11</td>    </tr>    <tr>        <td align="center">Ubuntu版本</td>        <td align="left">Ubuntu22.04的64位版本</td>      </tr>    <tr>        <td align="center">VMware® Workstation 16 Pro</td>        <td align="left">16.2.3 build-19376536</td>      </tr>    <tr>        <td align="center">终端软件</td>        <td align="left">MobaXterm(Professional Edition v23.0 Build 5042 (license))</td>      </tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看本文参考资料 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center">分类</td>        <td align="center">网址</td>        <td align="center">说明</td>    </tr>    <tr>        <td align="center" rowspan="6">官方网站</td>        <td align="left"><a href="https://cn.aliyun.com/" target="_blank">阿里云</a></td>        <td align="left">阿里云官网主页</td>    </tr>    <tr>        <td align="left"><a href="https://www.aliyun.com/product/iot/livinglink?spm=5176.28508143.J_4VYgf18xNlTAyFFbOuOQe.317.5421154acZniIL&scm=20140722.X_data-1da961ea118f5bb0e4b2._.V_1" target="_blank">阿里生活物联平台</a></td>        <td align="left">生活物联网平台(飞燕平台)主页</td>    </tr>    <tr>        <td align="left"><a href="https://iap.aligenie.com/?spm=0.7629140.0.0.2c611780Ty6tzg" target="_blank">AliGenie</a></td>        <td align="left">天猫精灵开放平台AliGenie主页</td>    </tr>    <tr>        <td align="left"><a href="https://www.aliyun.com/product/iot/iot_instc_public_cn?spm=5176.28508143.J_4VYgf18xNlTAyFFbOuOQe.81.5421154au3ocqp&scm=20140722.X_data-9349178ba84cf028806a._.V_1" target="_blank">阿里物联网平台</a></td>        <td align="left">阿里物联网平台主页</td>    </tr>    <tr>        <td align="left"><a href="https://www.bluetooth.com/zh-cn/" target="_blank">Bluetooth 技术网站</a></td>        <td align="left">蓝牙协议规范什么的可以来这里找</td>    </tr>    <tr>        <td align="left"><a href="https://www.telink-semi.com/" target="_blank">Telink</a></td>        <td align="left">Telink | Chips for a Smarter IoT (telink-semi.com)<br><a href="https://www.telink-semi.cn/" target="_blank">Telink中文官网</a></td>    </tr>    <tr>        <td align="center" rowspan="5">开发手册</td>        <td align="left"><a href="https://help.aliyun.com/zh/alios-things/" target="_blank">AliOS Things开发指南</a></td>        <td align="left">AliOS Things开发指南，这里是最新版本，可以直接从官网找到</td>    </tr>     <tr>        <td align="left"><a href="https://haas.iot.aliyun.com/aliosthings/index.html" target="_blank">AliOS Things开发指南</a></td>        <td align="left">AliOS Things应用开发指南，这里应该是3.3版本的完整开发文档</td>    </tr>    <tr>        <td align="left"><a href="https://gaic.alicdn.com/aic/h5_daily/test/aliosthings/3.0.13/index.html" target="_blank">AliOS Things开发指南(3.0)</a></td>        <td align="left">AliOS Things应用开发指南，这里应该是3.0版本的完整开发文档</td>    </tr>    <tr>        <td align="left"><a href="https://help.aliyun.com/product/123207.html?spm=a2c4g.11186623.6.540.114e60d84sF58G" target="_blank">生活物联网平台开发文档</a></td>        <td align="left">生活物联网平台（飞燕平台）开发文档<br><a href="https://help.aliyun.com/document_detail/180778.html?spm=a2c4g.123207.0.0.49556adcO5apvd" target="_blank">《设备端开发指南》</a></td>    </tr>    <tr>        <td align="left"><a href="https://doc-bot.tmall.com/docs/doc.htm?spm=0.7629140.0.0.7bf81780UN7WkQ&treeId=578&articleId=118057&docType=1" target="_blank">Wi-Fi IoT品类定义与功能开发</a></td>        <td align="left">天猫精灵IoT开放平台——Wi-Fi IoT品类定义与功能开发</td>    </tr>    <tr>        <td align="center" rowspan="3">硬件平台</td>        <td align="left"><a href="https://developer.aliyun.com/article/761644?spm=a2c6h.12873581.0.dArticle761644.1c1b589dRHgvcR&groupCode=genieaiot" target="_blank">mk3080 WiFi开发板</a></td>        <td align="left">WiFi开发板使用指南-阿里云开发者社区</td>    </tr>    <tr>        <td align="left"><a href="http://www.taichi-maker.com/homepage/esp8266-nodemcu-iot/esp8266-nodemcu-tutorial-index/" target="_blank">esp8266开发板</a></td>        <td align="left">一个教程：ESP8266-NodeMCU开发板详解-太极创客 (taichi-maker.com)</td>    </tr>    <tr>        <td align="left"><a href="https://wiki.telink-semi.cn/doc/ds/DS_TLSR8258-E_Datasheet%20for%20Telink%20BLE+IEEE802.15.4%20Multi-Standard%20Wireless%20SoC%20TLSR8258.pdf" target="_blank">TLSR8258 Datasheet</a></td>        <td align="left">Datasheet for Telink BLE + IEEE802.15.4 MultiStandard Wireless SoC TLSR8258</td>    </tr>    <tr>        <td align="center" rowspan="2">参考资料</td>        <td align="left"><a href="https://developer.aliyun.com/article/720516#" target="_blank">AliOS Things 3.0 应用开发指南</a></td>        <td align="left">这个只是一篇参考文章，里面是一些环境搭建相关的，可以参考</td>    </tr>    <tr>        <td align="left"><a href="https://info.support.huawei.com/info-finder/encyclopedia/zh/index.html" target="_blank">IP知识百科 - 华为 (huawei.com)</a></td>        <td align="left">IP的一些相关知识点</td>    </tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看相关文件下载 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center" width=150px>分类</td>        <td align="center">网址</td>        <td align="center">说明</td>    </tr>    <tr>        <td align="left" rowspan="6">蓝牙规范相关文档</td>        <td align="left"><a href="https://www.bluetooth.com/zh-cn/specifications/specs/core-specification-5-2/" target="_blank">Core Specification 5.2</a></td>        <td align="left">核心规格 5.2，该规范定义了创建可互操作的Bluetooth 设备所需的技术。                        <br><a href="./蓝牙参考资料/Core_v5.2.pdf" target="_blank">《Core_v5.2.pdf》</a></td>      </tr>    <tr>        <td align="left"><a href="https://www.bluetooth.com/zh-cn/specifications/specs/mesh-model-1-1/" target="_blank">Mesh Model(v1.1)</a></td>        <td align="left">本Bluetooth 规范定义了模型（以及它们所需的状态和消息），这些模型用于在mesh 网络中的节点上执行基本功能，超出了Bluetooth Mesh 配置文件 规范中定义的基础模型。                        <br>本规范包括定义跨设备类型标准功能的通用模型，以及支持关键mesh 场景的模型，如照明控制、传感器、时间和场景。                        <br><a href="./蓝牙参考资料/MshMDL_v1.1.pdf" target="_blank">《MshMDL_v1.1.pdf》</a></td>      </tr>    <tr>        <td align="left"><a href="https://www.bluetooth.com/zh-cn/specifications/specs/mesh-profile-1-0-1/" target="_blank">Mesh Profile(v1.0.1)</a></td>        <td align="left">该Bluetooth 规范定义了基本要求，以实现可互操作的mesh 网络解决方案，用于Bluetooth 低能量无线技术。                        <br><a href="./蓝牙参考资料/MshPRFv1.0.1.pdf" target="_blank">《MshPRFv1.0.1.pdf》</a></td>      </tr>    <tr>        <td align="left"><a href="https://www.bluetooth.com/zh-cn/specifications/device-properties/" target="_blank">Mesh Device Properties</a></td>        <td align="left">本规范包含Bluetooth Mesh 配置文件 和Bluetooth Mesh 模型规范所要求的设备属性的定义。                        <br>但是跟之前的有些区别，我主要看的之前的版本：<a href="./蓝牙参考资料/MeshDeviceProperties_v1.2.pdf" target="_blank">《MMeshDeviceProperties_v1.2.pdf》</a></td>      </tr>    <tr>        <td align="left"><a href="https://www.bluetooth.com/specifications/gss/" target="_blank">GATT Specification Supplement</a></td>        <td align="left">GATT Specification Supplement | Bluetooth® Technology Website。                        <br>好像可以在线看：<a href="https://btprodspecificationrefs.blob.core.windows.net/gatt-specification-supplement/GATT_Specification_Supplement.pdf" target="_blank">《GATT Specification Supplement》</a></td>      </tr>     <tr>        <td align="left"><a href="https://www.bluetooth.com/specifications/assigned-numbers/" target="_blank">Assigned Numbers</a></td>        <td align="left">GATT的一些类型定义可以在这里找。</td>      </tr>    <tr>        <td align="left" rowspan="2">AliOS Things</td>        <td align="left"><a href="https://gitee.com/alios-things-admin/AliOS-Things" target="_blank">alios-things/AliOS-Things</a></td>        <td align="left">Gitee上的AliOSThings SDK源码仓库</td>      </tr>    <tr>        <td align="left"><a href="https://github.com/alibaba/AliOS-Things" target="_blank">alibaba/AliOS-Things</a></td>        <td align="left">GitHub上的AliOSThings SDK源码仓库</td>      </tr>    <tr>        <td align="left" rowspan="2">天猫精灵蓝牙Mesh协议栈</td>        <td align="left"><a href="https://github.com/alibaba-archive/genie-bt-mesh-stack" target="_blank">alibaba-archive/genie-bt-mesh-stack</a></td>        <td align="left">GitHub上的天猫精灵蓝牙Mesh协议栈源码仓库。<br>之前是在<a href="https://github.com/alibaba/genie-bt-mesh-stack"target="_blank">alibaba/genie-bt-mesh-stack</a>这个仓库。<br>写笔记的时候最新提交为<a href="https://github.com/alibaba-archive/genie-bt-mesh-stack/tree/faf523618a6a2560090fc423222b9db80984bb7a" target="_blank">faf523618a6a2560090fc423222b9db80984bb7a</a></td>      </tr>    <tr>        <td align="left"><a href="https://help.aliyun.com/document_detail/171552.html?spm=a2c4g.173310.0.0.55d6e992e8xJip" target="_blank">蓝牙Mesh设备开发指南</a></td>        <td align="left">阿里云生活服务平台开发手册——蓝牙设备开发一节中的内容</td>      </tr></table>
              </div>
            </details>

<h1 id="一、多任务竞争资源分析"><a href="#一、多任务竞争资源分析" class="headerlink" title="一、多任务竞争资源分析"></a><font size=3>一、多任务竞争资源分析</font></h1><h2 id="1-我们只有一个串口"><a href="#1-我们只有一个串口" class="headerlink" title="1. 我们只有一个串口"></a><font size=3>1. 我们只有一个串口</font></h2><img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV21-%E5%A4%A9%E7%8C%AB%E7%B2%BE%E7%81%B5IOT/LV01-01-AliOSThings-12-%E4%BB%BB%E5%8A%A1%E9%97%B4%E9%80%9A%E4%BF%A1-06-%E4%BA%92%E6%96%A5%E9%94%81%E5%92%8C%E4%B8%B4%E7%95%8C%E5%8C%BA%E4%BD%BF%E7%94%A8%E5%AE%9E%E4%BE%8B/img/image-20200810154328192.png" alt="image-20200810154328192" style="zoom:50%;" />

<p>如图所示，其实我们的开发板通过串口向屏幕打印数据的时候，串口其实你就相当于各个任务的共享资源了，同一时刻只能有一个任务使用串口，否则数据打印就会出现错乱。</p>
<h2 id="2-一个实例"><a href="#2-一个实例" class="headerlink" title="2. 一个实例"></a><font size=3>2. 一个实例</font></h2><p>我们写一个实例，来验证一下不对串口进行保护会发生什么。这里以在mk3080开发板运行为例，其他也都一样。</p>
<h3 id="2-1-两个任务"><a href="#2-1-两个任务" class="headerlink" title="2.1 两个任务"></a><font size=3>2.1 两个任务</font></h3><p>首先我们创建两个任务，它们需要有一个优先级：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV21-%E5%A4%A9%E7%8C%AB%E7%B2%BE%E7%81%B5IOT/LV01-01-AliOSThings-12-%E4%BB%BB%E5%8A%A1%E9%97%B4%E9%80%9A%E4%BF%A1-06-%E4%BA%92%E6%96%A5%E9%94%81%E5%92%8C%E4%B8%B4%E7%95%8C%E5%8C%BA%E4%BD%BF%E7%94%A8%E5%AE%9E%E4%BE%8B/img/image-20231206192505192.png" alt="image-20231206192505192"  />

<h3 id="2-2-task1任务"><a href="#2-2-task1任务" class="headerlink" title="2.2 task1任务"></a><font size=3>2.2 task1任务</font></h3><p>我们再来看一下两个任务的内容，task1任务函数如下所示：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV21-%E5%A4%A9%E7%8C%AB%E7%B2%BE%E7%81%B5IOT/LV01-01-AliOSThings-12-%E4%BB%BB%E5%8A%A1%E9%97%B4%E9%80%9A%E4%BF%A1-06-%E4%BA%92%E6%96%A5%E9%94%81%E5%92%8C%E4%B8%B4%E7%95%8C%E5%8C%BA%E4%BD%BF%E7%94%A8%E5%AE%9E%E4%BE%8B/img/image-20231206192629302.png" alt="image-20231206192629302" />

<h3 id="2-3-task2任务"><a href="#2-3-task2任务" class="headerlink" title="2.3 task2任务"></a><font size=3>2.3 task2任务</font></h3><p>task2任务函数如下图所示：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV21-%E5%A4%A9%E7%8C%AB%E7%B2%BE%E7%81%B5IOT/LV01-01-AliOSThings-12-%E4%BB%BB%E5%8A%A1%E9%97%B4%E9%80%9A%E4%BF%A1-06-%E4%BA%92%E6%96%A5%E9%94%81%E5%92%8C%E4%B8%B4%E7%95%8C%E5%8C%BA%E4%BD%BF%E7%94%A8%E5%AE%9E%E4%BE%8B/img/image-20231206192855558.png" alt="image-20231206192855558" />

<h3 id="2-4-实例源码"><a href="#2-4-实例源码" class="headerlink" title="2.4 实例源码"></a><font size=3>2.4 实例源码</font></h3><p>完整源码如下，也可以看这里：<a target="_blank" rel="noopener" href="https://gitee.com/sumumm/ali-os-things-prj/blob/master/helloworld_mk3080/example/03_mutex_intrpt_none.c">helloworld_mk3080&#x2F;example&#x2F;03_mutex_intrpt_none.c · sumumm&#x2F;AliOS-Things-Prj - 码云 - 开源中国 (gitee.com)</a></p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/** =====================================================</span></span><br><span class="line"><span class="comment"> * Copyright © hk. 2022-2025. All rights reserved.</span></span><br><span class="line"><span class="comment"> * File name  : 03_mutex_intrpt.c</span></span><br><span class="line"><span class="comment"> * Author     : 上上签</span></span><br><span class="line"><span class="comment"> * Date       : 2023-12-05</span></span><br><span class="line"><span class="comment"> * Version    : </span></span><br><span class="line"><span class="comment"> * Description: </span></span><br><span class="line"><span class="comment"> * ======================================================</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;stdio.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;stdlib.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;aos/kernel.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;aos/init.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;board.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;k_api.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;aos/hal/gpio.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;ulog/ulog.h&quot;</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> RED_LED   0 <span class="comment">// PA14</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> GRE_LED   1 <span class="comment">// PA15</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY1_PORT 8 <span class="comment">// PA5</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY2_PORT 2 <span class="comment">// PA22</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY3_PORT 4 <span class="comment">// PA23</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> TASK1_NAME 		 <span class="string">&quot;task1&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> TASK2_NAME 		 <span class="string">&quot;task2&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> APP_MOUDLE_NAME  <span class="string">&quot;app_task&quot;</span></span></span><br><span class="line"></span><br><span class="line"><span class="type">aos_task_t</span>  task1_handle;</span><br><span class="line"><span class="type">aos_task_t</span>  task2_handle;</span><br><span class="line"></span><br><span class="line"><span class="type">gpio_dev_t</span>  led_gpio_dev[<span class="number">2</span>] = &#123;<span class="number">0</span>&#125;; </span><br><span class="line"><span class="type">gpio_dev_t</span>  key_gpio_dev;</span><br><span class="line"><span class="type">uint32_t</span>    key_value;</span><br><span class="line"><span class="type">void</span> <span class="title function_">task1_entry</span><span class="params">(<span class="type">void</span> *arg)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">const</span> <span class="type">char</span> * task_name;</span><br><span class="line">    task_name = aos_task_name();</span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;++++++++++%s test!++++++++++\r\n&quot;</span>, task_name);</span><br><span class="line">		aos_msleep(<span class="number">10</span>);</span><br><span class="line">	</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">void</span> <span class="title function_">task2_entry</span><span class="params">(<span class="type">void</span> *arg)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">const</span> <span class="type">char</span> * task_name;</span><br><span class="line">    task_name = aos_task_name();</span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 1\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 2\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 3\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 4\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 5\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 6\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 7\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 8\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 9\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 10\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 11\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 12\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 13\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 14\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 15\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 16\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 17\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 18\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 19\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 20\r\n&quot;</span>, task_name);</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">led_init</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="comment">//由于PA14时rtl8710的jtag接口，我要使用GPIO功能，必须先关闭jtag借口</span></span><br><span class="line">    sys_jtag_off();</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].port = RED_LED;</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].config = OUTPUT_PUSH_PULL;</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//gpio PA14初始化</span></span><br><span class="line">    hal_gpio_init(&amp;led_gpio_dev[<span class="number">0</span>]);</span><br><span class="line"></span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].port = GRE_LED;</span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].config = OUTPUT_PUSH_PULL;</span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//gpio PA14初始化</span></span><br><span class="line">    hal_gpio_init(&amp;led_gpio_dev[<span class="number">1</span>]);</span><br><span class="line"></span><br><span class="line">    <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">application_start</span><span class="params">(<span class="type">int</span> argc, <span class="type">char</span> *argv[])</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">int</span> ret = <span class="number">0</span>;</span><br><span class="line">    <span class="type">int</span> index = <span class="number">0</span>;</span><br><span class="line"></span><br><span class="line">    led_init();</span><br><span class="line">    key_gpio_dev.port = KEY1_PORT;</span><br><span class="line">    <span class="comment">//根据原理图分析配置位输入上拉模式</span></span><br><span class="line">    key_gpio_dev.config = INPUT_PULL_UP;</span><br><span class="line">    key_gpio_dev.priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//key 初始化</span></span><br><span class="line">    hal_gpio_init(&amp;key_gpio_dev);</span><br><span class="line"></span><br><span class="line">    aos_set_log_level(AOS_LL_INFO);</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 创建两个指定优先级的任务</span></span><br><span class="line">    ret = aos_task_new_ext(&amp;task1_handle, TASK1_NAME, task1_entry, <span class="literal">NULL</span>, <span class="number">4</span>*<span class="number">128</span>, <span class="number">58</span>);</span><br><span class="line">	<span class="keyword">if</span>(ret != <span class="number">0</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		LOGE(APP_MOUDLE_NAME,<span class="string">&quot;task key create err\r\n&quot;</span>);</span><br><span class="line">	&#125;</span><br><span class="line">	ret = aos_task_new_ext(&amp;task2_handle, TASK2_NAME, task2_entry, <span class="literal">NULL</span>, <span class="number">4</span>*<span class="number">128</span>, <span class="number">59</span>);</span><br><span class="line">	<span class="keyword">if</span>(ret != <span class="number">0</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		LOGE(APP_MOUDLE_NAME,<span class="string">&quot;task led create err\r\n&quot;</span>);</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">    &#123;</span><br><span class="line">        aos_msleep(<span class="number">1000</span>);</span><br><span class="line">        hal_gpio_output_toggle(&amp;led_gpio_dev[<span class="number">1</span>]);</span><br><span class="line">    &#125;</span><br><span class="line">  </span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="2-5-测试结果"><a href="#2-5-测试结果" class="headerlink" title="2.5 测试结果"></a><font size=3>2.5 测试结果</font></h3><p>烧写完成后，我们运行一下看一下运行结果：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV21-%E5%A4%A9%E7%8C%AB%E7%B2%BE%E7%81%B5IOT/LV01-01-AliOSThings-12-%E4%BB%BB%E5%8A%A1%E9%97%B4%E9%80%9A%E4%BF%A1-06-%E4%BA%92%E6%96%A5%E9%94%81%E5%92%8C%E4%B8%B4%E7%95%8C%E5%8C%BA%E4%BD%BF%E7%94%A8%E5%AE%9E%E4%BE%8B/img/image-20231206193904544.png" alt="image-20231206193904544" style="zoom:50%;" />

<p>可以看到，task1和task2出现竞争，我们的task2应该是要完整的打印完1-20的，但是实际被task1打断了3次，甚至于一行都没完整打印完就被打断了，这样是很危险的，怎么办》这时候就用到互斥锁啦。</p>
<h1 id="二、互斥锁"><a href="#二、互斥锁" class="headerlink" title="二、互斥锁"></a><font size=3>二、互斥锁</font></h1><p>这里以mk3080开发板为例。</p>
<h2 id="1-使用实例"><a href="#1-使用实例" class="headerlink" title="1. 使用实例"></a><font size=3>1. 使用实例</font></h2><p>我们修改一下代码，添加互斥锁进行保护，如下所示，也可以看这里：<a target="_blank" rel="noopener" href="https://gitee.com/sumumm/ali-os-things-prj/blob/master/helloworld_mk3080/example/03_mutex.c">helloworld_mk3080&#x2F;example&#x2F;03_mutex.c · sumumm&#x2F;AliOS-Things-Prj - 码云 - 开源中国 (gitee.com)</a></p>
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All rights reserved.</span></span><br><span class="line"><span class="comment"> * File name  : 03_mutex.c</span></span><br><span class="line"><span class="comment"> * Author     : 上上签</span></span><br><span class="line"><span class="comment"> * Date       : 2023-12-05</span></span><br><span class="line"><span class="comment"> * Version    : </span></span><br><span class="line"><span class="comment"> * Description: </span></span><br><span class="line"><span class="comment"> * ======================================================</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;stdio.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;stdlib.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;aos/kernel.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;aos/init.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;board.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;k_api.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;aos/hal/gpio.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;ulog/ulog.h&quot;</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> RED_LED   0 <span class="comment">// PA14</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> GRE_LED   1 <span class="comment">// PA15</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY1_PORT 8 <span class="comment">// PA5</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY2_PORT 2 <span class="comment">// PA22</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY3_PORT 4 <span class="comment">// PA23</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> TASK1_NAME 		 <span class="string">&quot;task1&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> TASK2_NAME 		 <span class="string">&quot;task2&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> APP_MOUDLE_NAME  <span class="string">&quot;app_task&quot;</span></span></span><br><span class="line"></span><br><span class="line"><span class="type">aos_task_t</span>  task1_handle;</span><br><span class="line"><span class="type">aos_task_t</span>  task2_handle;</span><br><span class="line"></span><br><span class="line"><span class="type">gpio_dev_t</span>  led_gpio_dev[<span class="number">2</span>] = &#123;<span class="number">0</span>&#125;; </span><br><span class="line"><span class="type">gpio_dev_t</span>  key_gpio_dev;</span><br><span class="line"><span class="type">uint32_t</span>    key_value;</span><br><span class="line"></span><br><span class="line"><span class="type">aos_mutex_t</span> printf_mutex;</span><br><span class="line"></span><br><span class="line"><span class="type">void</span> <span class="title function_">task1_entry</span><span class="params">(<span class="type">void</span> *arg)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">const</span> <span class="type">char</span> * task_name;</span><br><span class="line">    task_name = aos_task_name();</span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		aos_mutex_lock(&amp;printf_mutex, AOS_WAIT_FOREVER);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;++++++++++%s test!++++++++++\r\n&quot;</span>, task_name);</span><br><span class="line">		aos_mutex_unlock(&amp;printf_mutex);</span><br><span class="line">		aos_msleep(<span class="number">10</span>);</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">void</span> <span class="title function_">task2_entry</span><span class="params">(<span class="type">void</span> *arg)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">const</span> <span class="type">char</span> * task_name;</span><br><span class="line">    task_name = aos_task_name();</span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		aos_mutex_lock(&amp;printf_mutex, AOS_WAIT_FOREVER);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 1\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 2\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 3\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 4\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 5\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 6\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 7\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 8\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 9\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 10\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 11\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 12\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 13\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 14\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 15\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 16\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 17\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 18\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 19\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 20\r\n&quot;</span>, task_name);</span><br><span class="line">		aos_mutex_unlock(&amp;printf_mutex);</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">led_init</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="comment">//由于PA14时rtl8710的jtag接口，我要使用GPIO功能，必须先关闭jtag借口</span></span><br><span class="line">    sys_jtag_off();</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].port = RED_LED;</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].config = OUTPUT_PUSH_PULL;</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//gpio PA14初始化</span></span><br><span class="line">    hal_gpio_init(&amp;led_gpio_dev[<span class="number">0</span>]);</span><br><span class="line"></span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].port = GRE_LED;</span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].config = OUTPUT_PUSH_PULL;</span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//gpio PA14初始化</span></span><br><span class="line">    hal_gpio_init(&amp;led_gpio_dev[<span class="number">1</span>]);</span><br><span class="line"></span><br><span class="line">    <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">application_start</span><span class="params">(<span class="type">int</span> argc, <span class="type">char</span> *argv[])</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">int</span> ret = <span class="number">0</span>;</span><br><span class="line">    <span class="type">int</span> index = <span class="number">0</span>;</span><br><span class="line"></span><br><span class="line">    led_init();</span><br><span class="line">    key_gpio_dev.port = KEY1_PORT;</span><br><span class="line">    <span class="comment">//根据原理图分析配置位输入上拉模式</span></span><br><span class="line">    key_gpio_dev.config = INPUT_PULL_UP;</span><br><span class="line">    key_gpio_dev.priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//key 初始化</span></span><br><span class="line">    hal_gpio_init(&amp;key_gpio_dev);</span><br><span class="line"></span><br><span class="line">    aos_set_log_level(AOS_LL_INFO);</span><br><span class="line"></span><br><span class="line">	<span class="comment">// 初始化互斥锁</span></span><br><span class="line">	ret = aos_mutex_new(&amp;printf_mutex);</span><br><span class="line">	<span class="keyword">if</span>(ret != <span class="number">0</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		LOGE(APP_MOUDLE_NAME, <span class="string">&quot;New mutex erro\r\n&quot;</span>);</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 创建两个指定优先级的任务</span></span><br><span class="line">    ret = aos_task_new_ext(&amp;task1_handle, TASK1_NAME, task1_entry, <span class="literal">NULL</span>, <span class="number">8</span>*<span class="number">128</span>, <span class="number">58</span>);</span><br><span class="line">	<span class="keyword">if</span>(ret != <span class="number">0</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		LOGE(APP_MOUDLE_NAME,<span class="string">&quot;task key create err\r\n&quot;</span>);</span><br><span class="line">	&#125;</span><br><span class="line">	ret = aos_task_new_ext(&amp;task2_handle, TASK2_NAME, task2_entry, <span class="literal">NULL</span>, <span class="number">8</span>*<span class="number">128</span>, <span class="number">59</span>);</span><br><span class="line">	<span class="keyword">if</span>(ret != <span class="number">0</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		LOGE(APP_MOUDLE_NAME,<span class="string">&quot;task led create err\r\n&quot;</span>);</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">    &#123;</span><br><span class="line">        aos_msleep(<span class="number">1000</span>);</span><br><span class="line">        hal_gpio_output_toggle(&amp;led_gpio_dev[<span class="number">1</span>]);</span><br><span class="line">    &#125;</span><br><span class="line">  </span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="2-测试结果"><a href="#2-测试结果" class="headerlink" title="2. 测试结果"></a><font size=3>2. 测试结果</font></h2><p>我们更新代码，看一下这次的串口数据：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV21-%E5%A4%A9%E7%8C%AB%E7%B2%BE%E7%81%B5IOT/LV01-01-AliOSThings-12-%E4%BB%BB%E5%8A%A1%E9%97%B4%E9%80%9A%E4%BF%A1-06-%E4%BA%92%E6%96%A5%E9%94%81%E5%92%8C%E4%B8%B4%E7%95%8C%E5%8C%BA%E4%BD%BF%E7%94%A8%E5%AE%9E%E4%BE%8B/img/image-20231206194438636.png" alt="image-20231206194438636" style="zoom:50%;" />

<p>可以看到task2的数据都是完整打印完毕的，说明互斥锁生效了。</p>
<h1 id="三、临界区"><a href="#三、临界区" class="headerlink" title="三、临界区"></a><font size=3>三、临界区</font></h1><p>这里还是以mk3080开发板为例，上面我们通过互斥锁达到了目的，其实临界区也一样可以。</p>
<h2 id="1-使用实例-1"><a href="#1-使用实例-1" class="headerlink" title="1. 使用实例"></a><font size=3>1. 使用实例</font></h2><p>示例代码如下，也可以看这里：<a target="_blank" rel="noopener" href="https://gitee.com/sumumm/ali-os-things-prj/blob/master/helloworld_mk3080/example/03_intrpt.c">helloworld_mk3080&#x2F;example&#x2F;03_intrpt.c · sumumm&#x2F;AliOS-Things-Prj - Gitee.com</a></p>
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All rights reserved.</span></span><br><span class="line"><span class="comment"> * File name  : 04_mutex.c</span></span><br><span class="line"><span class="comment"> * Author     : 上上签</span></span><br><span class="line"><span class="comment"> * Date       : 2023-12-06</span></span><br><span class="line"><span class="comment"> * Version    : </span></span><br><span class="line"><span class="comment"> * Description: </span></span><br><span class="line"><span class="comment"> * ======================================================</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;stdio.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;stdlib.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;aos/kernel.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;aos/init.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;board.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&lt;k_api.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;aos/hal/gpio.h&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string">&quot;ulog/ulog.h&quot;</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> RED_LED   0 <span class="comment">// PA14</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> GRE_LED   1 <span class="comment">// PA15</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY1_PORT 8 <span class="comment">// PA5</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY2_PORT 2 <span class="comment">// PA22</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> KEY3_PORT 4 <span class="comment">// PA23</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> TASK1_NAME 		 <span class="string">&quot;task1&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> TASK2_NAME 		 <span class="string">&quot;task2&quot;</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> APP_MOUDLE_NAME  <span class="string">&quot;app_task&quot;</span></span></span><br><span class="line"></span><br><span class="line"><span class="type">aos_task_t</span>  task1_handle;</span><br><span class="line"><span class="type">aos_task_t</span>  task2_handle;</span><br><span class="line"></span><br><span class="line"><span class="type">gpio_dev_t</span>  led_gpio_dev[<span class="number">2</span>] = &#123;<span class="number">0</span>&#125;; </span><br><span class="line"><span class="type">gpio_dev_t</span>  key_gpio_dev;</span><br><span class="line"><span class="type">uint32_t</span>    key_value;</span><br><span class="line"></span><br><span class="line"><span class="type">void</span> <span class="title function_">task1_entry</span><span class="params">(<span class="type">void</span> *arg)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">const</span> <span class="type">char</span> * task_name;</span><br><span class="line">    task_name = aos_task_name();</span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;++++++++++%s test!++++++++++\r\n&quot;</span>, task_name);</span><br><span class="line">		aos_msleep(<span class="number">10</span>);</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">void</span> <span class="title function_">task2_entry</span><span class="params">(<span class="type">void</span> *arg)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">const</span> <span class="type">char</span> * task_name;</span><br><span class="line">    task_name = aos_task_name();</span><br><span class="line">	CPSR_ALLOC();</span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		RHINO_CRITICAL_ENTER();</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 1\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 2\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 3\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 4\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 5\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 6\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 7\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 8\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 9\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 10\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 11\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 12\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 13\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 14\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 15\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 16\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 17\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 18\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 19\r\n&quot;</span>, task_name);</span><br><span class="line">	 	<span class="built_in">printf</span>(<span class="string">&quot;%s test 20\r\n&quot;</span>, task_name);</span><br><span class="line">		RHINO_CRITICAL_EXIT();</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">led_init</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="comment">//由于PA14时rtl8710的jtag接口，我要使用GPIO功能，必须先关闭jtag借口</span></span><br><span class="line">    sys_jtag_off();</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].port = RED_LED;</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].config = OUTPUT_PUSH_PULL;</span><br><span class="line">    led_gpio_dev[<span class="number">0</span>].priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//gpio PA14初始化</span></span><br><span class="line">    hal_gpio_init(&amp;led_gpio_dev[<span class="number">0</span>]);</span><br><span class="line"></span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].port = GRE_LED;</span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].config = OUTPUT_PUSH_PULL;</span><br><span class="line">    led_gpio_dev[<span class="number">1</span>].priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//gpio PA14初始化</span></span><br><span class="line">    hal_gpio_init(&amp;led_gpio_dev[<span class="number">1</span>]);</span><br><span class="line"></span><br><span class="line">    <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">application_start</span><span class="params">(<span class="type">int</span> argc, <span class="type">char</span> *argv[])</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">int</span> ret = <span class="number">0</span>;</span><br><span class="line">    <span class="type">int</span> index = <span class="number">0</span>;</span><br><span class="line"></span><br><span class="line">    led_init();</span><br><span class="line">    key_gpio_dev.port = KEY1_PORT;</span><br><span class="line">    <span class="comment">//根据原理图分析配置位输入上拉模式</span></span><br><span class="line">    key_gpio_dev.config = INPUT_PULL_UP;</span><br><span class="line">    key_gpio_dev.priv = <span class="literal">NULL</span>;</span><br><span class="line">    <span class="comment">//key 初始化</span></span><br><span class="line">    hal_gpio_init(&amp;key_gpio_dev);</span><br><span class="line"></span><br><span class="line">    aos_set_log_level(AOS_LL_INFO);</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 创建两个指定优先级的任务</span></span><br><span class="line">    ret = aos_task_new_ext(&amp;task1_handle, TASK1_NAME, task1_entry, <span class="literal">NULL</span>, <span class="number">8</span>*<span class="number">128</span>, <span class="number">58</span>);</span><br><span class="line">	<span class="keyword">if</span>(ret != <span class="number">0</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		LOGE(APP_MOUDLE_NAME,<span class="string">&quot;task key create err\r\n&quot;</span>);</span><br><span class="line">	&#125;</span><br><span class="line">	ret = aos_task_new_ext(&amp;task2_handle, TASK2_NAME, task2_entry, <span class="literal">NULL</span>, <span class="number">8</span>*<span class="number">128</span>, <span class="number">59</span>);</span><br><span class="line">	<span class="keyword">if</span>(ret != <span class="number">0</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		LOGE(APP_MOUDLE_NAME,<span class="string">&quot;task led create err\r\n&quot;</span>);</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">    &#123;</span><br><span class="line">        aos_msleep(<span class="number">1000</span>);</span><br><span class="line">        hal_gpio_output_toggle(&amp;led_gpio_dev[<span class="number">1</span>]);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="2-测试结果-1"><a href="#2-测试结果-1" class="headerlink" title="2. 测试结果"></a><font size=3>2. 测试结果</font></h2><p>跟上面互斥锁的效果一样，但是虽然保护了task2不被task1打断，但是由于开关中断，且task2执行时间较长，这好像就影响到了task1，并非是task2执行完毕就执行task1，这应该是系统调度出现了问题导致。</p>
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    <p><span>文章标题:</span><a href="/post/9979bddc.html">LV01-01-AliOSThings-12-任务间通信-06-互斥锁和临界区使用实例</a></p>
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            seconds     - 0-59之间的整数，做为date对象的秒数
            microseconds - 0-999之间的整数，做为date对象的毫秒数
            ==================================================*/
            var t1 = Date.UTC(2017, 
                              5, 
                              19, 
                              0, 
                              0, 
                              0); //北京时间
            var t2 = Date.UTC(todayYear,todayMonth,todayDate,todayHour,todayMinute,todaySecond);
            var diff = t2-t1;
            var diffYears = Math.floor(diff/years);
            var diffDays = Math.floor((diff/days)-diffYears*365);
            var diffHours = Math.floor((diff-(diffYears*365+diffDays)*days)/hours);
            var diffMinutes = Math.floor((diff-(diffYears*365+diffDays)*days-diffHours*hours)/minutes);
            var diffSeconds = Math.floor((diff-(diffYears*365+diffDays)*days-diffHours*hours-diffMinutes*minutes)/seconds);
            document.getElementById("sitetime").innerHTML="已在这里 "+diffYears+" 年 "+diffDays+" 天 "+diffHours+" 小时 "+diffMinutes+" 分钟 "+diffSeconds+" 秒";
        }
        siteTime();
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